I'm working on a biomedical project, and need to transfer DC voltage from a source to a load. The problem is that the source has a high impedance relative to the load so I'm trying to have a DC voltage buffer (voltage follower) in between the source and the load. I came up with this circuit and seems that it works at least in simulation: https://www.circuitlab.com/circuit/xxkms467y7k8/dc-buffer/
As you can see in the figure, I don't want to use a separate VCC to power the V+ rail.
My questions are:
1- Would this circuit work in practice? I mean is it technically correct? Any suggestion to improve its performance? If not, what other options do I have to solve this problem? The solution in Passively Buffer Voltage didn't provide me with a low output impedance.
2- What are the best single supply op-amp options for this scenario? It has to handle a large range of v+ rail (from 1V to 15V). Also, the output impedance (RO) has to be low.
1- The load is the 100ohm resistor shown in the figure.
2- The output voltage must follow the input voltage (between 1 and 15V).